PVA Polyvinyl alcohol

1.PVA is mainly used in textile,fabric finishing agents
2.raw materials of vinylon fibers,construction,paint additives
PVA Product Characteristics and Instruction
1.Product Performance
Polymer is a kind of high polymer. It is white or light yellow floc, Granular or powdery in appearance.
Its molecular formula is[CH2CHOH]n,and the molecular formula for some of the PVA is -[CH2CHOH]n-[CH2CHOOCCH3]m-. PVA is non-toxic, insipid and harmless. PVA is water-soluble and the solvent provide good viscosity and film building. It can withstand oils, lubricants,
hydrocarbons and most other organic solvents. PVA has better chemical stability and insulatibility,
and provide ease in firm building; It possess the typical chemical properties of polyols and can carry
out process of esterification, etherealization, aceatalization etc.

2.Dissolving Temperature, thickness and time
PVA products dissolvent ability is determined by the degree of alcoholysis and polymerization.
When polymerization increased, the ability to dissolve will reduced. Likewise, when the degree of
alcoholysis decreased, the dissolvent temperature will reduced and water solubility will increase.
Fully alcoholysed PVA products are more sensitive to temperatures changes. Such products cannot
dissolve or experience partial swell in properties when temperature falls below required degree.
Blending will be difficult and foam created should the temperature exceed the required degree for
partial alcoholysis products. Temperature must be controlled at acceptable range for ease of dissolving.

Fully Hydrolyzed Grade
Item


Grade
Degree of alcoholysis (mol/mol) %≥
Viscosity mpa.s
Sodium acetate %≤
Volatile matter %≤
Ash %≤
PH value
PVA1599
99.0-100
16.0-22.0
2.5
8.0
1.5
5-7
PVA1799L
99.0-100
21.0-27.9
2.5
8.0
1.5
5-7
PVA1799H
99.0-100
28.0-35.0
2.5
8.0
1.5
5-7
PVA2099L
99.0-100
32.0-38.0
2.5
8.0
1.5
5-7
PVA2299L
99.0-100.0
37.0-48.0
2.5
8.0
1.5
5-7
PVA2499L
99.0-100.0
47.0-63.0
2.5
8.0
1.5
5-7
PVA2699L
99.0-100
62.0-75.0
2.5
8.0
1.5
5-7
PVA2899L
99.0-100
75.0-88.0
2.0
5.0
0.7
5-7